.tt{
    width:80%;
    margin:20px auto;
    border-collapse: collapse;

}
.tt tr th ,.tt tr td{
    padding:8px;
    border: 1px solid hotpink;
    text-align: center;
}
.tt caption{

    text-align: center;
    line-height: 50px;
    font:35px/50px '微软雅黑';
    color: #333;
}
.tt tr:hover{
    color:chocolate;
}